How to Customize Date Formatting in a DataGridView?

DataGridView date format customization

You want to display a "Last Action" column with a custom date format in the DataGridView. By default, Windows Forms formats DateTime values ​​according to system settings. However, you can override these settings programmatically using the DefaultCellStyle property.

For a specific column, you can control its date format as follows:

dataGrid.Columns[2].DefaultCellStyle.Format = "MM/dd/yyyy HH:mm:ss";

This line of code adjusts the format string to "MM/dd/yyyy HH:mm:ss" (for example, 2010/10/27 12:00:19).

If you prefer a 12-hour clock with AM/PM indicators, use the following format string instead:

dataGrid.Columns[2].DefaultCellStyle.Format = "MM/dd/yyyy hh:mm:ss tt";

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